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Time for Phase 2 bpimport of Exchange Image

kbrandt
Level 4

I am currently importing a Full Exchange backup. image  I am wondering what an estimate for how long Phase 2 might take would be?  The size of the all the mail stores on this image are ~220GB. It is currently at Beginning import and has been there for one and half hours, and I just want to make sure that this isn't likely frozen.

12:44:57 INF - Importing policy Exchange, schedule Full (mail01_1267970401), media id BO0065, created on 03/07/2010 09:00:01.
12:45:01 INF - Waiting for mount of media id BO0065 on server backup for reading.
12:45:40 INF - Waiting for positioning of media id BO0065 on server backup for reading.
12:46:13 INF - Beginning import on server backup1 of client mail01.

The command I used for phase 2 was:
/usr/openv/netbackup/bin/admincmd/bpimport  -Bidfile ~/image_to_import  -L ~/mail01_full_phase2_import_log

And image_to_import just contains the mail01_1267970401 string.
1 ACCEPTED SOLUTION

Accepted Solutions

Christoph_Linde
Level 5
Employee
Hi,

it depends on the performance of your tape drive/VTL and on the fact if you use Multiplexing or not.

As a Datastore backup of Exchange is one single file, you will have the maximum read performance of your drive.

If you have lets say a DLT 7000 Tape Drive (pretty old) with a compressed data rate of 10 MB/s (36 GB/h), than you have to wayt at least 220 GB/36GB/h means about 6 hours.

If you have LTO4 you have a performance of up to 240MB/s or 864GB/h. So it will read the complete image in about 25 Minutes.

Both values are true if you have Multiplexing disabled.

If you have Multiplexing enabled, it will take a bigger amount of time.

If you have a VTL, it depends on wether the VTL is utilized by other processes (including backup), net speed of VTL and Mutliplexing again.

If you can tell me what architecutre you use and what drive speed, I can give you a rough estimation.

View solution in original post

9 REPLIES 9

rjrumfelt
Level 6
have typically taken around 2-3 hours.  I dont think this is a hard and fast number. 

Christoph_Linde
Level 5
Employee
Hi,

it depends on the performance of your tape drive/VTL and on the fact if you use Multiplexing or not.

As a Datastore backup of Exchange is one single file, you will have the maximum read performance of your drive.

If you have lets say a DLT 7000 Tape Drive (pretty old) with a compressed data rate of 10 MB/s (36 GB/h), than you have to wayt at least 220 GB/36GB/h means about 6 hours.

If you have LTO4 you have a performance of up to 240MB/s or 864GB/h. So it will read the complete image in about 25 Minutes.

Both values are true if you have Multiplexing disabled.

If you have Multiplexing enabled, it will take a bigger amount of time.

If you have a VTL, it depends on wether the VTL is utilized by other processes (including backup), net speed of VTL and Mutliplexing again.

If you can tell me what architecutre you use and what drive speed, I can give you a rough estimation.

kbrandt
Level 4

Christoph: I have two HP Ultrium SCSI drives (currently one in use). In the GUI , I have One Storage Unit and Default Group, and then under Multiplexing I have "1". These drives are in a SL500 Sun library.

This enough information?

Hint: Don't guess lower than 2 hours 50 minutes as it has already taken this long :)

Will_Restore
Level 6
I estimate 2-3 hours. ;*)

Christoph_Linde
Level 5
Employee
Are those Ultrium 1?

Ultrium 1 will be able to read at maximum speed of 30 MB/s  - 100 GB/h. So should not take to long from now.

And I forgot another important parameter. Can you tell me the value of SIZE_DATA_BUFFERS on the Media Server? If it is at default, you will end up with a Buffer size of 64KByte. This will reduce the performance of the drive to lower speeds. You cannot change anything about it now.

The correct answer to your question is:

It will take as long as it takes ... *sorry*

kbrandt
Level 4

Okay, well the estimate were still helpful.  I guess the last thing is that in the Job Details for the import, it is normal to have Storage Unit, Media server, KB per second, all blank, the rest of the output is:

04/06/2010 12:45:00 - started process bptm (pid=11059)
04/06/2010 12:45:00 - mounting BO0065
04/06/2010 12:44:58 - requesting resource BO0065
04/06/2010 12:44:58 - granted resource BO0065
04/06/2010 12:44:58 - granted resource HP.ULTRIUM3-SCSI.000
04/06/2010 12:45:39 - mounted BO0065; mount time: 0:00:39
04/06/2010 12:45:40 - positioning BO0065 to file 9
04/06/2010 12:46:13 - positioned BO0065; position time: 0:00:33
04/06/2010 12:46:13 - begin reading

And it says Ultrium3, sorry, that was a typo...

J_H_Is_gone
Level 6
4/6/2010 2:27:00 PM - positioning Tape1 to file 1
4/6/2010 2:27:40 PM - positioned Tape1; position time: 00:00:40
4/6/2010 2:27:40 PM - begin reading
4/6/2010 3:09:29 PM - end reading; read time: 00:41:49
4/6/2010 3:09:32 PM - end Import; elapsed time: 02:35:40

it took 2:35 and it only had 2 servers backed up on the tape.

I can take a while and it does not show any activity until done.

Marianne
Level 6
Partner    VIP    Accredited Certified
My personal experience: phase 2 takes more or less as long as the backup did...

kbrandt
Level 4

Final time was 3:35. Marked Chris's answer as the solution as that made it clear to me that it had to read the whole backup, which I wasn't aware of.